For the first time since 1990, the U.S. Department of Agriculture has updated its Plant Hardiness Zone Map.
Plant hardiness zone designations represent the average annual extreme minimum temperatures. Low temperature during the winter is a crucial factor in the survival of plants, according to the USDA.
LaRue County is among the areas that have been upgraded for planting temperatures due to the overall warming trend. Although that probably won’t make that much difference to gardeners, according to LaRue County Extension Agent David Harrison.
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